Possible Causes
- The engine control module measured a signal voltage above a specified range but not necessarily a short circuit to power
- Connector is disconnected, connector pin is backed out, connector pin corrosion
- Engine coolant temperature sensor circuit, short circuit to power
- Engine coolant temperature sensor failure
- Blockage in coolant system
- Electric cooling fan circuit short circuit to ground, short circuit to power, open circuit, high resistance
- Electric cooling fan failure